Trifluoromethanesulfonic acid → 17-Ethyl-1-hydroxy-14-(tert-butyldimethylsiloxy)-12-[2'-(4"-allyloxy-3"-methoxycyclohexyl)-1'-methylvinyl]-23,25-dimethoxy-13,19,21,27-tetramethyl-11,28-dioxa-4-azatricyclo[22.3.1.04,9]octacos-18-ene-2,3,10,16-tetraone

HRID 1656268Notes

Reaction equation

HRID 1656268 reaction equation
[CH2:1]([CH:3]1[CH:29]=[C:28]([CH3:30])[CH2:27][CH:26]([CH3:31])[CH2:25][CH:24]([O:32][CH3:33])[CH:23]2[O:34][C:19]([OH:38])([CH:20]([CH3:37])[CH2:21][CH:22]2[O:35][CH3:36])[C:18](=[O:39])[C:17](=[O:40])[N:16]2[CH:11]([CH2:12][CH2:13][CH2:14][CH2:15]2)[C:10](=[O:41])[O:9][CH:8]([C:42]([CH3:53])=[CH:43][CH:44]2[CH2:49][CH2:48][CH:47]([OH:50])[CH:46]([O:51][CH3:52])[CH2:45]2)[CH:7]([CH3:54])[CH:6]([O:55][Si:56]([C:59]([CH3:62])([CH3:61])[CH3:60])([CH3:58])[CH3:57])[CH2:5][C:4]1=[O:63])[CH3:2].ClC(Cl)(Cl)C(=N)O[CH2:68][CH:69]=[CH2:70].FC(F)(F)S(O)(=O)=O>C(Cl)Cl.C1CCCCC1.C(OCC)(=O)C>[CH2:1]([CH:3]1[CH:29]=[C:28]([CH3:30])[CH2:27][CH:26]([CH3:31])[CH2:25][CH:24]([O:32][CH3:33])[CH:23]2[O:34][C:19]([OH:38])([CH:20]([CH3:37])[CH2:21][CH:22]2[O:35][CH3:36])[C:18](=[O:39])[C:17](=[O:40])[N:16]2[CH:11]([CH2:12][CH2:13][CH2:14][CH2:15]2)[C:10](=[O:41])[O:9][CH:8]([C:42]([CH3:53])=[CH:43][CH:44]2[CH2:49][CH2:48][CH:47]([O:50][CH2:70][CH:69]=[CH2:68])[CH:46]([O:51][CH3:52])[CH2:45]2)[CH:7]([CH3:54])[CH:6]([O:55][Si:56]([C:59]([CH3:60])([CH3:61])[CH3:62])([CH3:58])[CH3:57])[CH2:5][C:4]1=[O:63])[CH3:2]

Participants

7

Reactant 3

HCID 62406Trifluoromethanesulfonic acidHCID 316905Allyl 2,2,2-TrichloroacetimidateHCID 5724677817-Ethyl-1-hydroxy-12-[2'-(4"-hydroxy-3"-methoxycyclohexyl)-1'-methylvinyl]-14-t-butyl-dimethylsilyloxy-23,25-dimethoxy-13,19,21,27-tetramethyl-11,28-dioxa-4-azatricyclo[22.3.1.04,9]octacos-18-ene-2,3,10,16-tetraone

Product 1

HCID 5711397117-Ethyl-1-hydroxy-14-(tert-butyldimethylsiloxy)-12-[2'-(4"-allyloxy-3"-methoxycyclohexyl)-1'-methylvinyl]-23,25-dimethoxy-13,19,21,27-tetramethyl-11,28-dioxa-4-azatricyclo[22.3.1.04,9]octacos-18-ene-2,3,10,16-tetraoneYield 47%

Reagents, catalysts & solvents 3

HCID 6344DichloromethaneSolventHCID 8078CyclohexaneSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of 17-ethyl-1-hydroxy-14-(tert-butyldimethylsiloxy)-12-[2'-(4"-hydroxy-3"-methoxycyclohexyl)-1'-methylvinyl]-23,25-dimethoxy-13,19,21,27-tetramethyl-11,28-dioxa-4-azatricyclo[22.3.1.04,9]octacos-18-ene-2,3,10,16-tetraone (2.1 g) (STEP 11B) in 24 ml 33% methylene chloride in cyclohexane, was added allyl trichloroacetimidate (938 mg neat) and the reaction mixture was allowed to mix for 5 minutes. Trifluoromethanesulfonic acid (41 μl neat) was added slowly via syringe and the mixture stirred at room temperature. After 24 hours, the reaction mixture was diluted with ethyl acetate and washed with saturated sodium bicarbonate, water and brine. The organic layer was dried over magnesium sulfate. Purification of the concentrate by flash chromatography on silica gel (ethyl acetate:hexane (1:5))+1% methanol) gave the title compound (1.03 g). 1H NMR consistent with the desired structure.

Workup

  1. additionto mix for 5 minutes
  2. washwashed with saturated sodium bicarbonate, water and brine
  3. dry with materialThe organic layer was dried over magnesium sulfate
  4. customPurification of the
  5. concentrationconcentrate by flash chromatography on silica gel (ethyl acetate:hexane (1:5))+1% methanol)

Sources & evidence

ORD record
ord-6c87c1131a4a4e3f85dd1eab98fa0abb
Source dataset
uspto-grants-1993_10
Patent number
US05252732

Reaction notes

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